Supermoon

A supermoon is a full moon or a new moon that nearly coincides with perigee—the closest that the Moon comes to the Earth in its elliptic orbit—resulting in a slightly larger-than-usual apparent size of the Moon as viewed from Earth. The technical name is a perigee syzygy or a full Moon around perigee. Because the term supermoon is astrological in origin, it has no precise astronomical definition.